845
FXUS64 KHUN 300919
AFDHUN

Area Forecast Discussion
National Weather Service Huntsville AL
419 AM CDT Sun Aug 30 2026

...New AVIATION...

.KEY MESSAGES...
Updated at 821 PM CDT Sat Aug 29 2026

 - Moderate to Major Heat Risk is forecast Sunday through Saturday
   with afternoon heat indices rising between 100-105 degrees.

&&

.NEAR TERM...
(Today)
Issued at 218 AM CDT Sun Aug 30 2026

A 5h anticyclone over OK will remain in place today with a surface
high pressure centered along the mid Atlantic coastline. Light south-
southeast flow in low levels will spread dew points in the lower
70s over the remainder of the TN Valley today. Afternoon high
temperatures will reach the 90-94 range in valley areas, with
upper 80s atop the higher elevations. Scattered high based cumulus
will develop, but rain chances will remain at less than 10%.

&&

.SHORT TERM...
(Sunday night through Tuesday)
Issued at 821 PM CDT Sat Aug 29 2026

The heat dome that has been locked in across the deep south begins
to expand eastward towards the Tennessee Valley as we head into
next week. Subsidence underneath the ridge should limit any precip
chances, although given the hot and humid conditions cannot rule
out a very low chance (5-10%) of an afternoon shower or
storm early next week. Of greater concern is the heat as temperatures
on Monday and Tuesday will warm into the mid 90s with heat
indices between 100-105 degrees. While these values are below
advisory criteria, the consecutive days of very hot conditions
will start to become an issue. Of note, Moderate Heat Risk (level
2 of 4) is forecast on Monday with Major Heat Risk (level 3 out of
4) expected on Tuesday for most locations. Unfortunately, there
is not much relief from the heat overnight as lows only drop down
into the lower 70s

&&

.LONG TERM...
(Tuesday night through Saturday)
Issued at 821 PM CDT Sat Aug 29 2026

A stout upper ridge as well as high pressure to our northeast over
the Appalachians will keep most shower and storm activity out of the
forecast (aside from perhaps low chances over the terrain) through
the next week. Therefore, hot and humid conditions will continue to
be the theme next week with forecast highs in the lower to mid 90s,
lows in the lower to mid 70s, and dew points in the upper 60s to
lower 70s each day. This will result in Heat Indices ranging between
100-107 degrees each day, along with NWS HeatRisk in the Moderate to
Major (Levels 2 and 3 of 4) categories every day and WBGTs in the mid
to upper 80s each afternoon. We`ll need to keep an eye to see if any
heat products will be necessary; however, regardless, please
practice heat safety! This is especially important if you work
outdoors or have outdoor activities. Make sure to dress in light-
colored, loose-fitting clothing, drink plenty of water, and take
frequent breaks in the shade. Also, never leave people or pets in
vehicles!

&&

.AVIATION...
(12Z TAFS)
Issued at 420 AM CDT Sun Aug 30 2026

VFR flight weather conditions are expected.

&&

.CLIMATE...
Issued at 555 PM CDT Sat Aug 29 2026

Moderate Risk for Much Above Normal Temperatures:

The Climate Prediction Center has included northern Alabama and
southern Middle Tennessee in a Moderate Risk for Much Above
Normal Temperatures for September 6th through the 8th. There is a
40-60% chance for temperatures above 95 degrees F and heat index
values exceeding 105 degrees F during this period.

More information on the CPC U.S. Hazards Outlook can be found at:
https://www.cpc.ncep.noaa.gov/products/predictions/threats/threats.php

&&

.HUN WATCHES/WARNINGS/ADVISORIES...
AL...None.
TN...None.
&&

$$

NEAR TERM...17
SHORT TERM....GH
LONG TERM....26
AVIATION...17